Former Owner
- Robert Charles Winthrop1
- Robert Devereux, 2nd Earl of Essex1
- Robert Dudley, 1st Earl of Leicester1
- Robert Fyncham1
- Robert Hoe III14
- Robert Lehman5
- Robert Rossiter Hutton1
- Robert Wheeler Willson1
- Robert de Hangest1
- Roderick Terry1
- Rolls1
- Rosamond B. Loring2
- Rowland G. Hazard1
- Royal Monastery of Saint Mary of Guadalupe1
- Sabina Sopheija Behren1
- Saint Mihiel Abbey1
- Saint-Riquier1
- Samuel Addington1
- Samuel Allen4
- Samuel Butler1